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C2851-35UC/K9
2851 w/ PVDM2-48,NME-CUE,35 CME/CUE/Ph lic,SP Serv,128F/512D
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C2851-35UC/K9 is a robust integrated services router built on a modular architecture that supports expansion via EHWIC modules, ensuring flexible customization while maintaining reliable performance. It offers versatile power options with an AC power supply, high availability redundancy, and dual WAN interfaces along with dedicated LAN ports that expedite secure connectivity and advanced integrated services.
C2851-35UC/K9 delivers industry-class throughput and comprehensive VPN features, supporting routing protocols such as OSPF, BGP, EIGRP, and RIP to meet the communications demands of dynamic enterprise environments. Its integrated voice capabilities, built-in firewall, and modular design make it ideally suited for branch offices and unified communications deployments that require robust performance and reliable redundancy.
C2851-35UC/K9 price is $6,309.00, a 54.6% saving from the Cisco list price of $13,895.00. C2851-35UC/K9 is in stock and available for next-day dispatch. (terms applied)
Request bulk order quote for C2851-35UC/K9 for additional pricing. Browse the full Router Isr 2800 series or explore all Cisco products.
In a multi‐site financial services firm, IT deploys the Cisco C2851-35UC/K9 with PVDM2-48 DSPs, NME-CUE, 35 CME/CUE/Ph licenses, SP Services and 128F/512D memory to deliver unified data and voice over dual Gigabit Ethernet. The platform supports up to 35 concurrent Cisco Unified Communications Manager Express calls, applies advanced QoS for voice prioritization and provides secure VPN backhaul to headquarters. Outcome: consolidates routing and telephony on one device, cuts hardware CAPEX by 40%, and ensures 99.99% uptime for critical voice and trading applications.
A managed service provider uses the Cisco C2851-35UC/K9 with PVDM2-48, SP Services licensing and 128F/512D memory to aggregate 50+ site-to-site IPsec tunnels and deliver multi-tenant connectivity. The NME-CUE module hosts edge IVR applications and the 35 CME/CUE/Ph licenses enable hosted voice services for small business customers. Benefit: centralized VPN and voice management, 30% faster customer onboarding, and end-to-end AES-256 encryption with carrier-grade QoS.
In a regional healthcare network, the Cisco C2851-35UC/K9 with PVDM2-48 DSPs, NME-CUE and 35 CME/CUE/Ph licenses powers secure telemedicine consultations and automated IVR patient check-in. SP Services ensures encrypted EHR access over IPsec, while 128F/512D memory supports routing segmentation for PHI traffic. Outcome: achieves full HIPAA compliance, reduces call setup time by 25%, and halves the physical footprint compared to separate voice and data appliances.
To get the detailed certification, please go to the Compliance Center.
 C2851-35UC/K9 |  C2811-WAE-302/K9 |  C2851-H-VSEC/K9 |  CISCO2801-AC-IP |  CISCO2851-WAE/K9 | |
|---|---|---|---|---|---|
| 5G Support | No | No | No | No | No |
| Architecture | Modular | Modular | Fixed | Fixed | Modular |
| Broadband | N/A | N/A | N/A | N/A | N/A |
| Built-in Security Features | Firewall / Intrusion Prevention | Firewall / Intrusion Prevention | Firewall / Intrusion Prevention | Firewall, Intrusion Prevention, Malware Protection | Firewall, Intrusion Prevention, Malware Protection |
| Compliance Standards | FCC / CE / RoHS | IEEE 802.3 / IEEE 802.11 | FCC / CE / RoHS | IEEE 802.3, FCC, CE | FCC, CE, UL |
| Connectivity Type | Wired | Wired | Wired | Wired | Wired / Wireless / Ethernet |
| Depth | N/A | N/A | N/A | N/A | 11.3 inches |
| Device Type | Router | Router | Router | Router | Router |
| EMC | N/A | N/A | N/A | N/A | N/A |
| Ethernet Technology | 10/100 | 10/100 | 10/100 | 10/100 | 10/100 |
| Expansion Slots | EHWIC | EHWIC | EHWIC | EHWIC | EHWIC |
| Features | VPN / VoIP / Integrated Services / Firewall | VPN / IPv6 Compatible / Firewall | VPN / VoIP / IPv6 Compatible / Firewall | VPN, Voice, IPv6 Compatible, Firewall, Modular Expansion | Voice, VPN, IPv6 Compatible, Firewall |
| Firewall Features | Yes | Yes | Yes | Yes | Yes |
| Flash Memory | 128 MB | 128 MB | 256 MB | 128 MB | 256 MB |
| Form Factor | Rack-mount | Chassis | Rack-mount | Desktop / Rack-mount | Rack-mount |
| Height | N/A | N/A | N/A | N/A | 1.73 inches |
| High Availability Support | Supported | Supported | Supported | Not Supported | Not Supported |
| Integrated Services | Voice | Voice / Video / WAN Optimization | Voice | Voice, Video, WAN Optimization | Voice, Data, Security, Wireless |
| Interface Ports | RJ-45 | RJ-45 | RJ-45 | RJ-45, Console Port, AUX Port | RJ-45 |
| LAN Ports | 2 LAN Ports | 2 LAN Ports | N/A | 2 LAN Ports | 4 LAN Ports |
| Management | Managed | Managed | Managed | Managed | Managed |
| Memory | 256 MB | 256 MB | 512 MB | 256 MB | 256 MB |
| Modular Slots Available | 2 Slots | 2 Slots | 2 Slots | 2 Slots | 2 Slots |
| Network Protocols | IPv4 / IPv6 | IP / TCP/IP / UDP / ICMP | IPv4 / IPv6 | IP, Frame Relay, ATM | IPv4, IPv6 |
| Power | 220 W | 225 W | 140W | 150W | 70W |
| Power Source | AC Power Supply | AC Power Supply / Redundant | AC Power Supply / Redundant | AC Power Supply | AC Power Supply |
| Product Name | Cisco 2851 Integrated Services Router (UC) | Cisco 2811 Integrated Services Router Wireless Access Edition | Cisco 2851-H-VSEC/K9 | Cisco 2801-AC-IP Integrated Services Router | Cisco 2851 Integrated Services Router - Wireless Access Edition |
| Product Type | Enterprise Router | Enterprise Router | Enterprise Router | Enterprise Router | Enterprise Router |
| QoS Features | Supported | Supported | Supported | Supported | Supported |
| Remote Management | Telnet / SSH / SNMP | SSH / Telnet / SNMP | SSH / Telnet / SNMP | SSH, Telnet, SNMP | SNMP, Telnet, SSH |
| Routing Protocols | OSPF / BGP / EIGRP / RIP / Static Routing | OSPF / BGP / EIGRP / RIP / Static Routing | OSPF / BGP / EIGRP / RIP / Static Routing | OSPF / BGP / EIGRP / RIP / Static Routing | OSPF / EIGRP / BGP / RIP / Static Routing |
| Safety | N/A | N/A | N/A | N/A | N/A |
| Speed/Capacity | N/A | N/A | N/A | 100Mbps | 10/100 |
| Stacking Capability | No | No | No | No | No |
| Telecom | N/A | N/A | N/A | N/A | N/A |
| Throughput Capacity | 75 Mbps | N/A | 0.085 Gbps | 75 Mbps | 25 Mbps |
| Use Case | Enterprise / Business | Enterprise | Enterprise | Business / Small Business / Enterprise Branch | Enterprise |
| VPN Support | IPSec / SSL VPN / DMVPN | IPSec / DMVPN / N/A | IPSec / SSL VPN / DMVPN | IPSec | IPSec / GRE / DMVPN |
| WAN Configuration | Dual WAN | Dual WAN | Dual WAN | Dual WAN | Dual WAN |
| WAN Ports | 2 WAN | 2 WAN | 2 WAN | 2 WAN | 2 WAN |
| Weight | N/A | N/A | N/A | N/A | 15.6 lbs |
| Wi-Fi Standard | N/A | WiFi 3 | N/A | N/A | WiFi 4 |
| Width | N/A | N/A | N/A | N/A | 17.0 inches |
| Wireless Support | No | Yes | No | No | Yes |
Cisco 2851 Voice Bundle with 35 CME/CUE licenses provides high-performance UC. PVDM2-48 ensures stable voice and application services.
Durable and reliable. Handles multiple endpoints efficiently while maintaining secure and predictable UC operations.
Easy to deploy and manage. Provides seamless voice, UC, and network services for medium branch offices.
Reliable Cisco solution. Supports high-quality voice and UC communications across multiple branch endpoints.
High-performing and robust. Ideal for offices needing consistent UC, voice, and network performance.
The Cisco C2851-35UC/K9 is an integrated services router featuring a PVDM2-48 voice DSP, NME-CUE media module, 35 concurrent CME/CUE/Ph licenses, Service Provider services, 128 MB flash, and 512 MB DRAM.
Key hardware features include a dual-core 1 GHz processor, PVDM2-48 DSP slots, NME-CUE voice module support, four integrated Gigabit Ethernet ports, and modular WAN interface capabilities.
PVDM2-48 is a Cisco digital signal processor module that supports up to 48 voice channels for transcoding, conferencing, and media processing on the 2851 platform.
The NME-CUE (Network Module Enhanced – Cisco Unity Express) delivers on-premises voicemail, auto attendant, and messaging services directly on the 2851 router.